DFI SB750 boards, more scuttlebut.. NOW WITH DFI LINKS

[namegt]

My other test results

CPU : 9950BE
Mainboard : DFI Lanparty DK 790FXB
RAM : G.SKILL DDR2 2G PC2-6400 HZ 1x2
VGA : x1600pro
Power : ZM 750-HP
Cooler : The default cooler
OS : WINDOWS XP PRO SP3
bios : 0909


3G OC Prime Test


ACC : AUTO


pi : 26.516s


Intelburn Test


Everest bench

bios set





Test Gallery





http://www.parkoz.com

My OC Blog
http://namegt.tistory.com

[Rammsteiner]

my board came with 8/27. ya ACC for sure is working as promised by AMD, 300MHZ+ increases.

like you i had massive idle freezing on sb600, but from 2.8GHZ+. couldnt even get past 2.9GHZ without instant lockups. 46c is good. you have some more room (~9-10c). ramp up those MHZ's!

I'd love to but the first idle freezing is a fact already at 3Ghz, although I didnt play a lot with Voltages/ACC yet.

It seems like Prime Blend already crashes on the first second with a slight OC on the NB as well. I hope with a bit more Volts this can be solved but, yeah, no NB Voltage options

To highlight the idle freezing a bit more, all of you who had issues with this, did ACC (be it lower or higher) and/or Voltage help anything regarding idle freezing? Because from my experience Voltage helped a bit on the SB600 but sooner or later it froze up anyway. Sometimes after 30h but when I play a game sometimes within 5 minutes, and that's not doable. With more Voltage I could only extend it a bit but it's still unstability in the end. I still didnt have a chance to play some with ACC, but if anyone has experience with ACC + idle freezing I'd like to know before I waste weeks to solve idle freezing like on the SB600.

If it's not possible to get the idle freezing wall higher, Ive a chip for sure It's alreayd freezing at 3Ghz, Im not sure if it also freezes at 2.9Ghz but as long as it doesnt happen I cant be sure. Still congrats for AMD to make this SB750, it does a great job anyway.

[Brother Esau]

So is it my understanding that the SB750 implementation Did Not Resolve the Phenom Freezing?

[pershoot]

I'd love to but the first idle freezing is a fact already at 3Ghz, although I didnt play a lot with Voltages/ACC yet.

It seems like Prime Blend already crashes on the first second with a slight OC on the NB as well. I hope with a bit more Volts this can be solved but, yeah, no NB Voltage options

To highlight the idle freezing a bit more, all of you who had issues with this, did ACC (be it lower or higher) and/or Voltage help anything regarding idle freezing? Because from my experience Voltage helped a bit on the SB600 but sooner or later it froze up anyway. Sometimes after 30h but when I play a game sometimes within 5 minutes, and that's not doable. With more Voltage I could only extend it a bit but it's still unstability in the end. I still didnt have a chance to play some with ACC, but if anyone has experience with ACC + idle freezing I'd like to know before I waste weeks to solve idle freezing like on the SB600.

If it's not possible to get the idle freezing wall higher, Ive a chip for sure It's alreayd freezing at 3Ghz, Im not sure if it also freezes at 2.9Ghz but as long as it doesnt happen I cant be sure. Still congrats for AMD to make this SB750, it does a great job anyway.

looks like i fixed my idle freeze on my particular cpu (hasn't frozen yet in over 24 hours; but still testing). ACC is now at (top to bottom) +4,+2,+2,+2. try that. i can do 3.2, but having some heat issues, so need to sort that before i bump the volts back up to stay at 3.2GHZ (havent tested the aforementioned acc setting for idle freeze at 3.2 yet, only 3.1). before adjusting acc, set your multiplier back to stock, save, adjust acc, up the multiplier (i noticed some buggy behavior on the bios causing a false alarm no post, so i have been doing it this way...). boot in to windows, shutdown. power up, if you POST, go back in to windows and let it sit there/browse the web, play music, etc. to test idle freezing. i can only post with auto, +2 or +4 (so that's why its best to shutdown and then power up to ensure that you can POST from cold boot; once you play with acc, youll know which values result in a non POST, etc., for you).

flash to 9/19 beta if you haven't done so yet. it helps with stability over the stock bios.

i dont use prime95 anymore, so cant help ya on that front. i have been using occt. works well for me!

good luck

[pershoot]

So is it my understanding that the SB750 implementation Did Not Resolve the Phenom Freezing?

nope. but acc tweaking can cure it (your mileage may vary).

[Rammsteiner]

So is it my understanding that the SB750 implementation Did Not Resolve the Phenom Freezing?

No And the most retarded part, this nowhere a clear guide or guideline to be found to get it at least happen less bad

looks like i fixed my idle freeze on my particular cpu (hasn't frozen yet in over 24 hours; but still testing). ACC is now at (top to bottom) +4,+2,+2,+2. try that. i can do 3.2, but having some heat issues, so need to sort that before i bump the volts back up to stay at 3.2GHZ (havent tested the aforementioned acc setting for idle freeze at 3.2 yet, only 3.1). before adjusting acc, set your multiplier back to stock, save, adjust acc, up the multiplier (i noticed some buggy behavior on the bios causing a false alarm no post, so i have been doing it this way...). boot in to windows, shutdown. power up, if you POST, go back in to windows and let it sit there/browse the web, play music, etc. to test idle freezing. i can only post with auto, +2 or +4 (so that's why its best to shutdown and then power up to ensure that you can POST from cold boot; once you play with acc, youll know which values result in a non POST, etc., for you).

flash to 9/19 beta if you haven't done so yet. it helps with stability over the stock bios.

i dont use prime95 anymore, so cant help ya on that front. i have been using occt. works well for me!

good luck

Cool, please do report if it freezes though! Because from my experience when you test a setting it may work many hours before freezing but the next time you try it it may as well happen in the same hour.

Stupidly, just after I made my post the system froze at 2.9Ghz. I decided to increase my Vcore another 0.025mV (so +0.050mV it is in total), change my RAM tRFC over all for DIMMs to 127ns and changed my ACC to -4 to all cores.

I first tried +4 but it already froze before log in weird enough. One would think +x would help more but since we've not a big clue about -x or +x, -x might help as well. I decided to pick -4 since auto showed -2 although I cant be sure if it really was at -2 in the end.

Im set on trying to solve idle freezing now though because I tried increase Vcore and lowering clocks previously on my SB600 setup and this only resulted in the conclusion that everything above stock simple froze up, no matter how many hours of stress testing. Even 2.6Ghz froze in idle. I do think that idle freezing has something to do with a timing issue somewhere between the CPU and the motherboard or so since it seriously makes no clue that 2.9Ghz is prime stable but idle it just doesnt.

Im idle testing by watching some vids on youtube, playing WinAmp all the time and browsing some around and posting on fora when I can.

On my SB600 I couldnt even boot at 2.9Ghz, now Im mainly wondering if ACC is actually just increasing the ability to OC or solves idle freezing from forming a wall for your OC. The higher you clocked on the SB600, the faster the system froze up;
2.6Ghz ---> took a while to freeze up
2.7Ghz ---> after a few hours
2.8Ghz ---> between immediate and an hour after stopping stress testing
2.9Ghz ---> directly after hitting enter to log in
3.0Ghz ---> directly after POST before the Windows loading bar
But now I can actually boot up 3Ghz without issues, it doesnt idle freeze right away either. It takes a little bit of time. So I think ACC does something here, but in what direction to go, Ive no clue

Whatever I get solved in the end or Ive to run stock, I dont care either way... as long as Deneb sticks for Q4/Jan '09

[pershoot]

No And the most retarded part, this nowhere a clear guide or guideline to be found to get it at least happen less bad


Cool, please do report if it freezes though! Because from my experience when you test a setting it may work many hours before freezing but the next time you try it it may as well happen in the same hour.

Stupidly, just after I made my post the system froze at 2.9Ghz. I decided to increase my Vcore another 0.025mV (so +0.050mV it is in total), change my RAM tRFC over all for DIMMs to 127ns and changed my ACC to -4 to all cores.

I first tried +4 but it already froze before log in weird enough. One would think +x would help more but since we've not a big clue about -x or +x, -x might help as well. I decided to pick -4 since auto showed -2 although I cant be sure if it really was at -2 in the end.

Im set on trying to solve idle freezing now though because I tried increase Vcore and lowering clocks previously on my SB600 setup and this only resulted in the conclusion that everything above stock simple froze up, no matter how many hours of stress testing. Even 2.6Ghz froze in idle. I do think that idle freezing has something to do with a timing issue somewhere between the CPU and the motherboard or so since it seriously makes no clue that 2.9Ghz is prime stable but idle it just doesnt.

Im idle testing by watching some vids on youtube, playing WinAmp all the time and browsing some around and posting on fora when I can.

On my SB600 I couldnt even boot at 2.9Ghz, now Im mainly wondering if ACC is actually just increasing the ability to OC or solves idle freezing from forming a wall for your OC. The higher you clocked on the SB600, the faster the system froze up;
2.6Ghz ---> took a while to freeze up
2.7Ghz ---> after a few hours
2.8Ghz ---> between immediate and an hour after stopping stress testing
2.9Ghz ---> directly after hitting enter to log in
3.0Ghz ---> directly after POST before the Windows loading bar
But now I can actually boot up 3Ghz without issues, it doesnt idle freeze right away either. It takes a little bit of time. So I think ACC does something here, but in what direction to go, Ive no clue

Whatever I get solved in the end or Ive to run stock, I dont care either way... as long as Deneb sticks for Q4/Jan '09

it just shows - when u set auto. i doubt its actually setting - for all or even setting that. for me, trying a uniform acc number did nothing for the freeze. once i offset core 0 in reference to the other cores, things looked lots better. ya keep playing with acc, one core at a time. im confident youll hammer down the idle freeze. my particular cpu is sensitive to volts (to not only cpu volts but also to dram volts as well). not sure if yours is as well, but might want to be sparing on it (i.e. only give it if it needs it). i know.. takes a ton of reboots and time.. but hey, you have a new toy to play with!

[Rammsteiner]

I take it ACC 0 is basicly considered to be disabled?

Thus far Im 4.5 hours idle now with about 2~3x a short 1 minute Prime95 run to increase and derease load instant. Im thinking to leave it overnight running to be sure.

I also vagelue remember I used to BSOD at 3Ghz with ACC +4 but Im seriously not sure. Stupid I didnt note it down though. But thus far it seems like my CPU loves ACC - values. But I had more 'thoughts' in the past with the SB600 setup which actually shot all the ways except the right direction but then again the SB600 simply had no cure for the idle freezing problem

Ill see. Im now busy mainly getting the idle freezing cured. If that succeeds Ill try bumping up the Mhz's and the Volts. But I dont think Vcore is doing anything to cure it so I think I might actually hit 3Ghz at stock Volts, but hey, cant be sure anyway

And please, PM me if your current setting does not seem to run idle stable

EDIT Im on 64-bit OS as well so currently Im pleased apart from the idle freezing

[Rammsteiner]

I did a few quick tests;

2.9Ghz, +0.025mV, -4/-4/-4/-4
Core 4 errors immediately in Prime Blend

3Ghz, +0.025mV, 0/0/0/+2
Prime 95 crashes (as application, not errors)? Happened twice in a row.

3Ghz, +0.025mV, +2/+2/+2/+4
BSOD's after a minute in Prime Blend

lol, wut.

I noticed the 4th core is the weakest, but Ill play around more tomorrow to figure out whether the 2nd test I did is a matter of too low Vcore or wrong ACC settings or something.

I read from anandtech that stock value from SB600 the ACC was -2 ~ 0. With SB750, as you know, you can go from -12 ~ +12, with - going into the less Vcore direction and with + higher clock direction. Interesting.

Could someone btw comment on my tests? BSOD shows easily the settings were crap, but what about the 2nd? It actually never happened to me that Prime crashed as a program, always either error or BSOD Does this means more Vcore? Or is that impossible so I should be looking at ACC?

Thx in advance and gdnight.

[nuts24]

I had a quick play with my board yesterday, set ACC to +4 all cores, set the voltages a little higher and hit 3.3 Ghz on all for cores on my 9850. When I get in tonight I will see if the settings I used work againg and if so I will do a CPU-Z and a screen dump and post them.

[Corsa]

Idle freezing huh...are u guys running performance on demand ? ..if so, I once had the same problem

[Rammsteiner]

Decided to test more extensively, although my testing isnt pure precise but I want a quick reference to work down from there. I didnt test to have the first core a higher ACC than the other cores, Ill try that after this current test.

Thus far I got this;

ACC - Mhz - Vcore - result in Prime Blend
Auto - 3Ghz - auto - freeze after 3 min
+2/+2/+2/+2 - 3Ghz - auto - core 3 error'd
+2/+2/+4/+2 - 3Ghz - auto - freeze after 2 min

Decided to (hopefull) rule out Vcore;

Auto - 3Ghz - +0.075V - idle freeze but ran Prime Blend twice for 25min+
+2/+2/+2/+2 - 3Ghz - +0.075V - freeze with Prime in the back ground browsing sites

Im now testing the same as above with 0/0/0/0, if that doesnt work Ill get back to setting a higher ACC value. Frustrating but Ive a hope I can get it solved.

Pers, did your setup froze up yet btw?

[Mechromancer]

Rammsteiner, I have doubts about your CPU. I pray Deneb will deliver you from CPU hell LOL. Goodluck!

[pershoot]

rammsteiner,
nope, no more freezes at ACC: +4,+2,+2,+2.

[Rammsteiner]

Rammsteiner, I have doubts about your CPU. I pray Deneb will deliver you from CPU hell LOL. Goodluck!

You say what I think

Im willing to try anyway. Maybe it's just a setting issue in the BIOS. If the same happens with Deneb, which I really dont hope though, I at least know in some way what to do.

Thus far Im testing the same settings as pershoot and it ran idle for an hour with 20m Prime Blend run before that. While typing this Im running Prime Blend again for a few minutes to create different load and idle situations.

I might as well keep Prime running for another 2 hours (watching movie) followed by an overnight idle test. Everytime I run a new idle test I reload WinAmp so I can see how long it actually kept on running before an eventual freeze.

[xPliziT]

Rammsteiner do you use the 09/19 beta bios ? If not then try it.

[Rammsteiner]

Rammsteiner do you use the 09/19 beta bios ? If not then try it.

No, Im not.

I might try it but in the end Ive had these exact same issues on the DFI Lanparty UT 790FX-M2R with loads of different BIOS's and tests, also on the Gigabyte 790FX-DQ6. If it was a simple BIOS case then I think it would have been solved a long time ago. It must be some stupid setting which certain CPU's are sensitive for or it's just a stupid crap CPU... In that way it simply idle freezes, it's still a great CPU but a bit dissapointing to still see it freezing while idle.

Im now trying desperate things, like setting the NB to ganged instead of unganged... I dont know why though, Ill see. If I dont get soon a certain idea where I should be looking at to get it solved Ill set it back to default again and wait for Deneb anyway.

I can increase clocks epicly, SB750 does its job in that regard. But what's the point if idle freezing is still an issue, in the end that was the reason why I had to run default on my SB600 boards, not because it wouldnt OC but simply doe to the freezing, even at 2.6Ghz

Raising ACC etc is an option but it gained me nothing thus far really. I think ACC, just like Voltage, cant fix it. As said, maybe there's a certain setting which some steppings are sensitive for

[pershoot]

rammsteiner,
nope, no more freezes at ACC: +4,+2,+2,+2.

spoke to soon. was frozen after i returned from work. testing more acc...

[Rammsteiner]

spoke to soon. was frozen after i returned from work. testing more acc...

Thus far Ive great results using Ganged mode though. Maybe it's just luck though, Ill let the PC run even longer and do now and then certain actions which used to make the PC freeze. Things as opening quickly about 10 web pages and closing them by spamming 'X' buttons, scrolling sites and selecting text etc. Of course WinAmp in the back ground.

It's been running roughly 7 hours idle now while it was the exact same setting as I used last night which resulted in a freeze pretty soon. I hope I got the solution now although we've all seen 12h+ stableness and with the next reboot a freeze after 5 min so Im not too excited yet

[Brother Esau]

If you are running XP Pro 64 Bit Edition then that's your problem. I had no love what so ever trying to run that O.S with my 9850 BE and any deviation from default Vcore settings Lower or Higher @ (STOCK) would result in System Freeze which never happened in XP32 or Vista 32 just in XP64 and I tried to no avail with 5 install attempts and the same crap every time.

Try XP32 and see if you duplicate the situation please

As a point of interest I never got a chance to see the worth and Merit of Vista 64 bit to see if it would improve the experience that I had on XP64

[nuts24]

Up to 3.4 GHz on vista 32bit.

http://valid.x86-secret.com/show_oc.php?id=436889

see my post here http://www.xtremesystems.org/forums/...d.php?t=205598 for screen dumps, just posted new pics.

[xPliziT]

Rammsteiner donte WASTE your time with the stock bios !!!

Test the beta because it made a HUGE difference on my 9950.

Stock BIOS: barely stable at 3 GHz XP32 and Vista 64
Beta BIOS: 3.3 GHz STABLE XP32 AND Vista 64 !!!

So its up to you.....


And btw saw lots of ACC values from you guys here.

Just for diversity got my stable oc using +2 -2 +2 -2 !

The instable cores are at -2% !

[Rammsteiner]

If you are running XP Pro 64 Bit Edition then that's your problem. I had no love what so ever trying to run that O.S with my 9850 BE and any deviation from default Vcore settings Lower or Higher @ (STOCK) would result in System Freeze which never happened in XP32 or Vista 32 just in XP64 and I tried to no avail with 5 install attempts and the same crap every time.

Try XP32 and see if you duplicate the situation please

As a point of interest I never got a chance to see the worth and Merit of Vista 64 bit to see if it would improve the experience that I had on XP64

Ive 4GB of RAM, a GPU with 2GB of GDDR etc. Also Im aware that a 64-bit OS does lower my final OC, but, this shouldnt result in idle freezing as Ive it now. 64-bit OS simply sets the wall lower than a 32-bit OS. Idle freezing is just some up

Rammsteiner donte WASTE your time with the stock bios !!!

Test the beta because it made a HUGE difference on my 9950.

Stock BIOS: barely stable at 3 GHz XP32 and Vista 64
Beta BIOS: 3.3 GHz STABLE XP32 AND Vista 64 !!!

So its up to you.....


And btw saw lots of ACC values from you guys here.

Just for diversity got my stable oc using +2 -2 +2 -2 !

The instable cores are at -2% !

Nice!

However, did you suffer from idle freezing though? Unstable and idle freezing are still different things. There's like no possibility to see what core is the problem at all. The whole system locks up and you cant check anything at all, no error occures in Prime. Just an insta-freeze and the only solution is the reset button. Running stock right now, Im done with it. Maybe I might order a 9950BE or Ill just wait the remaining two months for Deneb. All Ive to say is, this CPU is plain crap.

If it was a BIOS issue, all Ive to say that either DFI would have noted this in the BIOS release notes since it's quite an issue, the minorty suffer from it, but the minorty is still a huge number though. Otherwise it could have been solved in the UT 790FX-M2R BIOS already and/or the 790FX-DQ6 BIOS. It didnt

[adamsleath]

If you are running XP Pro 64 Bit Edition then that's your problem. I had no love what so ever trying to run that O.S with my 9850 BE and any deviation from default Vcore settings Lower or Higher @ (STOCK) would result in System Freeze which never happened in XP32 or Vista 32 just in XP64 and I tried to no avail with 5 install attempts and the same crap every time.

Try XP32 and see if you duplicate the situation please

As a point of interest I never got a chance to see the worth and Merit of Vista 64 bit to see if it would improve the experience that I had on XP64

...sounds like a bit of a downer for 64bit os
doesnt oc as well either

[Brother Esau]

Ive 4GB of RAM, a GPU with 2GB of GDDR etc. Also Im aware that a 64-bit OS does lower my final OC, but, this shouldnt result in idle freezing as Ive it now. 64-bit OS simply sets the wall lower than a 32-bit OS. Idle freezing is just some up


Nice!

However, did you suffer from idle freezing though? Unstable and idle freezing are still different things. There's like no possibility to see what core is the problem at all. The whole system locks up and you cant check anything at all, no error occures in Prime. Just an insta-freeze and the only solution is the reset button. Running stock right now, Im done with it. Maybe I might order a 9950BE or Ill just wait the remaining two months for Deneb. All Ive to say is, this CPU is plain crap.

If it was a BIOS issue, all Ive to say that either DFI would have noted this in the BIOS release notes since it's quite an issue, the minorty suffer from it, but the minorty is still a huge number though. Otherwise it could have been solved in the UT 790FX-M2R BIOS already and/or the 790FX-DQ6 BIOS. It didnt

Yea well........ I am telling you thats what you would think but its not the case Because I had my entire system at (STOCK BIOS SETTINGS) No Overclocking what so ever!

Try as I say and get back to us please.